Function usage

packages/jest-core/src/watch.ts:536–584

(
  globalConfig: Config.GlobalConfig,
  watchPlugins: Array<WatchPlugin>,
  delimiter = '\n',
)

};

const usage = (
  globalConfig: Config.GlobalConfig,
  watchPlugins: Array<WatchPlugin>,
  delimiter = '\n',
) => {
  const testPathPatterns = globalConfig.testPathPatterns;
  const messages = [
    activeFilters(globalConfig),

    testPathPatterns.isSet() || globalConfig.testNamePattern
      ? `${chalk.dim(' \u203A Press ')}c${chalk.dim(' to clear filters.')}`
      : null,
    `\n${chalk.bold('Watch Usage')}`,

    globalConfig.watch
      ? `${chalk.dim(' \u203A Press ')}a${chalk.dim(' to run all tests.')}`
      : null,

    globalConfig.onlyFailures
      ? `${chalk.dim(' \u203A Press ')}f${chalk.dim(
          ' to quit "only failed tests" mode.',
        )}`
      : `${chalk.dim(' \u203A Press ')}f${chalk.dim(
          ' to run only failed tests.',
        )}`,

    (globalConfig.watchAll ||
      testPathPatterns.isSet() ||
      globalConfig.testNamePattern) &&
    !globalConfig.noSCM
      ? `${chalk.dim(' \u203A Press ')}o${chalk.dim(
          ' to only run tests related to changed files.',
        )}`
      : null,

    ...getSortedUsageRows(watchPlugins, globalConfig).map(
      plugin =>
        `${chalk.dim(' \u203A Press')} ${plugin.key} ${chalk.dim(
          `to ${plugin.prompt}.`,
        )}`,
    ),

    `${chalk.dim(' \u203A Press ')}Enter${chalk.dim(
      ' to trigger a test run.',
    )}`,
  ];

  return `${messages.filter(message => !!message).join(delimiter)}\n`;
};

const showToggleUsagePrompt = () =>
  '\n' +